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	<title>Problem Set -- page 7 -- 衡阳八中OJ离线版-2012-02-29</title>
<h3 align='center'><a href='list-1.html'>1</a>&nbsp;<a href='list-2.html'>2</a>&nbsp;<a href='list-3.html'>3</a>&nbsp;<a href='list-4.html'>4</a>&nbsp;<a href='list-5.html'>5</a>&nbsp;<a href='list-6.html'>6</a>&nbsp;<span class=red>7</span>&nbsp;<a href='list-8.html'>8</a>&nbsp;<a href='list-9.html'>9</a>&nbsp;<a href='list-10.html'>10</a>&nbsp;<a href='list-11.html'>11</a>&nbsp;<a href='list-12.html'>12</a>&nbsp;<a href='list-13.html'>13</a>&nbsp;<a href='list-14.html'>14</a>&nbsp;<a href='list-15.html'>15</a>&nbsp;<a href='list-16.html'>16</a>&nbsp;<a href='list-17.html'>17</a></h3>
<center><table id='problemset' width='90%'>
<thead><tr align='center' class='evenrow'><td width='5'></td><td width='10%' colspan='1'><form action='problem.php' onsubmit='jump2prob(); return false;' >Problem ID<input id='jump2prob-id' type='text' name='id' size=5><input type='submit' value='GO' ></form></td><td width='90%' colspan='4'><form onsubmit='searchInTable(2); return false;' >Search<input id="search-content-id" type='text' name='search'><input type='submit' value='Search' ></form></td></tr><tr align=center class='toprow'><td width='5'><td style="cursor:hand" onclick="sortTable('problemset', 1, 'int');" width=10%><A>Problem ID</A><td width='60%'>Title</td><td width='20%'>Source</td><td style="cursor:hand" onclick="sortTable('problemset', 4, 'int');" width='5%'><A>AC</A></td><td style="cursor:hand" onclick="sortTable('problemset', 5, 'int');" width='5%'><A>Submit</A></td></tr></thead>
<tbody>
<tr align=center class='toprow'><td width='5'><td style="cursor:hand" onclick="sortTable('problemset', 1, 'int');" width=10%><A>Problem ID</A><td width='60%'>Title</td><td width='20%'>Source</td><td style="cursor:hand" onclick="sortTable('problemset', 4, 'int');" width='5%'><A>AC</A></td><td style="cursor:hand" onclick="sortTable('problemset', 5, 'int');" width='5%'><A>Submit</A></td></tr>
</thead><tbody>
<tr class='evenrow'><td></td><td align='center'>1600</td><td align='left'><a href='problem-1600.html'>[Usaco2008 Oct]建造栅栏</a></td><td align='center'>资格赛</td><td align='center'><a href='status.php?problem_id=1600&jresult=4'>201</a></td><td align='center'><a href='status.php?problem_id=1600'>351</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1601</td><td align='left'><a href='problem-1601.html'>[Usaco2008 Oct]灌水
</a></td><td align='center'>资格赛</td><td align='center'><a href='status.php?problem_id=1601&jresult=4'>362</a></td><td align='center'><a href='status.php?problem_id=1601'>526</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1602</td><td align='left'><a href='problem-1602.html'>[Usaco2008 Oct]牧场行走
</a></td><td align='center'>资格赛</td><td align='center'><a href='status.php?problem_id=1602&jresult=4'>216</a></td><td align='center'><a href='status.php?problem_id=1602'>379</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1603</td><td align='left'><a href='problem-1603.html'>[Usaco2008 Oct]打谷机</a></td><td align='center'>资格赛</td><td align='center'><a href='status.php?problem_id=1603&jresult=4'>224</a></td><td align='center'><a href='status.php?problem_id=1603'>271</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1604</td><td align='left'><a href='problem-1604.html'>[Usaco2008 Open]Cow Neighborhoods</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1604&jresult=4'>50</a></td><td align='center'><a href='status.php?problem_id=1604'>133</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1605</td><td align='left'><a href='problem-1605.html'>[Usaco2008 Open]Crisis on the Farm
</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1605&jresult=4'>38</a></td><td align='center'><a href='status.php?problem_id=1605'>96</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1606</td><td align='left'><a href='problem-1606.html'>[Usaco2008 Dec]Hay For Sale</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1606&jresult=4'>240</a></td><td align='center'><a href='status.php?problem_id=1606'>344</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1607</td><td align='left'><a href='problem-1607.html'>[Usaco2008 Dec]Patting Heads</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1607&jresult=4'>169</a></td><td align='center'><a href='status.php?problem_id=1607'>273</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1608</td><td align='left'><a href='problem-1608.html'>[Usaco2008 Dec]Jigsaw Puzzles</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1608&jresult=4'>0</a></td><td align='center'><a href='status.php?problem_id=1608'>27</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1609</td><td align='left'><a href='problem-1609.html'>[Usaco2008 Feb]Eating Together麻烦的聚餐</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1609&jresult=4'>250</a></td><td align='center'><a href='status.php?problem_id=1609'>411</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1610</td><td align='left'><a href='problem-1610.html'>[Usaco2008 Feb]Line连线游戏</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1610&jresult=4'>252</a></td><td align='center'><a href='status.php?problem_id=1610'>534</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1611</td><td align='left'><a href='problem-1611.html'>[Usaco2008 Feb]Meteor Shower流星雨</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1611&jresult=4'>166</a></td><td align='center'><a href='status.php?problem_id=1611'>373</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1612</td><td align='left'><a href='problem-1612.html'>[Usaco2008 Jan]Cow Contest奶牛的比赛</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1612&jresult=4'>189</a></td><td align='center'><a href='status.php?problem_id=1612'>300</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1613</td><td align='left'><a href='problem-1613.html'>[Usaco2007 Jan]Running贝茜的晨练计划</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1613&jresult=4'>242</a></td><td align='center'><a href='status.php?problem_id=1613'>504</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1614</td><td align='left'><a href='problem-1614.html'>[Usaco2007 Jan]Telephone Lines架设电话线</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1614&jresult=4'>177</a></td><td align='center'><a href='status.php?problem_id=1614'>380</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1615</td><td align='left'><a href='problem-1615.html'>[Usaco2008 Mar]The Loathesome Hay Baler麻烦的干草打包机</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1615&jresult=4'>80</a></td><td align='center'><a href='status.php?problem_id=1615'>218</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1616</td><td align='left'><a href='problem-1616.html'>[Usaco2008 Mar]Cow Travelling游荡的奶牛</a></td><td align='center'>Silver
</td><td align='center'><a href='status.php?problem_id=1616&jresult=4'>194</a></td><td align='center'><a href='status.php?problem_id=1616'>323</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1617</td><td align='left'><a href='problem-1617.html'>[Usaco2008 Mar]River Crossing渡河问题</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1617&jresult=4'>235</a></td><td align='center'><a href='status.php?problem_id=1617'>314</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1618</td><td align='left'><a href='problem-1618.html'>[Usaco2008 Nov]Buying Hay</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1618&jresult=4'>150</a></td><td align='center'><a href='status.php?problem_id=1618'>308</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1619</td><td align='left'><a href='problem-1619.html'>[Usaco2008 Nov]Guarding the Farm</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1619&jresult=4'>72</a></td><td align='center'><a href='status.php?problem_id=1619'>189</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1620</td><td align='left'><a href='problem-1620.html'>[Usaco2008 Nov]Time Management</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1620&jresult=4'>127</a></td><td align='center'><a href='status.php?problem_id=1620'>220</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1621</td><td align='left'><a href='problem-1621.html'>[Usaco2008 Open]Roads Around The Farm</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1621&jresult=4'>188</a></td><td align='center'><a href='status.php?problem_id=1621'>260</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1622</td><td align='left'><a href='problem-1622.html'>[Usaco2008 Open]Word Power</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1622&jresult=4'>53</a></td><td align='center'><a href='status.php?problem_id=1622'>159</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1623</td><td align='left'><a href='problem-1623.html'>[Usaco2008 Open]Cow Cars</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1623&jresult=4'>50</a></td><td align='center'><a href='status.php?problem_id=1623'>70</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1624</td><td align='left'><a href='problem-1624.html'>[Usaco2008 Open] Clear And Present Danger</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1624&jresult=4'>101</a></td><td align='center'><a href='status.php?problem_id=1624'>137</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1625</td><td align='left'><a href='problem-1625.html'>[Usaco2007 Dec]宝石手镯</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1625&jresult=4'>298</a></td><td align='center'><a href='status.php?problem_id=1625'>466</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1626</td><td align='left'><a href='problem-1626.html'>[Usaco2007 Dec]Building Roads 修建道路</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1626&jresult=4'>172</a></td><td align='center'><a href='status.php?problem_id=1626'>426</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1627</td><td align='left'><a href='problem-1627.html'>[Usaco2007 Dec]穿越泥地</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1627&jresult=4'>139</a></td><td align='center'><a href='status.php?problem_id=1627'>221</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1628</td><td align='left'><a href='problem-1628.html'>[Usaco2007 Demo]City skyline</a></td><td align='center'>Silver
</td><td align='center'><a href='status.php?problem_id=1628&jresult=4'>95</a></td><td align='center'><a href='status.php?problem_id=1628'>115</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1629</td><td align='left'><a href='problem-1629.html'>[Usaco2007 Demo]Cow Acrobats</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1629&jresult=4'>111</a></td><td align='center'><a href='status.php?problem_id=1629'>213</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1630</td><td align='left'><a href='problem-1630.html'>[Usaco2007 Demo]Ant Counting</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1630&jresult=4'>49</a></td><td align='center'><a href='status.php?problem_id=1630'>81</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1631</td><td align='left'><a href='problem-1631.html'>[Usaco2007 Feb]Cow Party</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1631&jresult=4'>165</a></td><td align='center'><a href='status.php?problem_id=1631'>223</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1632</td><td align='left'><a href='problem-1632.html'>[Usaco2007 Feb]Lilypad Pond</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1632&jresult=4'>39</a></td><td align='center'><a href='status.php?problem_id=1632'>150</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1633</td><td align='left'><a href='problem-1633.html'>[Usaco2007 Feb]The Cow Lexicon</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1633&jresult=4'>76</a></td><td align='center'><a href='status.php?problem_id=1633'>157</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1634</td><td align='left'><a href='problem-1634.html'>[Usaco2007 Jan]Protecting the Flowers</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1634&jresult=4'>129</a></td><td align='center'><a href='status.php?problem_id=1634'>234</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1635</td><td align='left'><a href='problem-1635.html'>[Usaco2007 Jan]Tallest Cow</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1635&jresult=4'>66</a></td><td align='center'><a href='status.php?problem_id=1635'>112</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1636</td><td align='left'><a href='problem-1636.html'>[Usaco2007 Jan]Balanced Lineup</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1636&jresult=4'>137</a></td><td align='center'><a href='status.php?problem_id=1636'>160</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1637</td><td align='left'><a href='problem-1637.html'>[Usaco2007 Mar]Balanced Lineup</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1637&jresult=4'>106</a></td><td align='center'><a href='status.php?problem_id=1637'>165</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1638</td><td align='left'><a href='problem-1638.html'>[Usaco2007 Mar]Cow Traffic</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1638&jresult=4'>93</a></td><td align='center'><a href='status.php?problem_id=1638'>283</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1639</td><td align='left'><a href='problem-1639.html'>[Usaco2007 Mar]Monthly Expense</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1639&jresult=4'>138</a></td><td align='center'><a href='status.php?problem_id=1639'>266</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1640</td><td align='left'><a href='problem-1640.html'>[Usaco2007 Nov]Best Cow Line</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1640&jresult=4'>119</a></td><td align='center'><a href='status.php?problem_id=1640'>240</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1641</td><td align='left'><a href='problem-1641.html'>[Usaco2007 Nov]Cow Hurdles</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1641&jresult=4'>118</a></td><td align='center'><a href='status.php?problem_id=1641'>150</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1642</td><td align='left'><a href='problem-1642.html'>[Usaco2007 Nov]Milking Time</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1642&jresult=4'>164</a></td><td align='center'><a href='status.php?problem_id=1642'>300</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1643</td><td align='left'><a href='problem-1643.html'>[Usaco2007 Oct]Bessie's Secret Pasture</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1643&jresult=4'>88</a></td><td align='center'><a href='status.php?problem_id=1643'>109</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1644</td><td align='left'><a href='problem-1644.html'>[Usaco2007 Oct]Obstacle Course
</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1644&jresult=4'>61</a></td><td align='center'><a href='status.php?problem_id=1644'>105</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1645</td><td align='left'><a href='problem-1645.html'>[Usaco2007 Open]City Horizon</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1645&jresult=4'>63</a></td><td align='center'><a href='status.php?problem_id=1645'>122</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1646</td><td align='left'><a href='problem-1646.html'>[Usaco2007 Open]Catch That Cow</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1646&jresult=4'>138</a></td><td align='center'><a href='status.php?problem_id=1646'>286</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1647</td><td align='left'><a href='problem-1647.html'>[Usaco2007 Open]Fliptile</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1647&jresult=4'>62</a></td><td align='center'><a href='status.php?problem_id=1647'>156</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1648</td><td align='left'><a href='problem-1648.html'>[Usaco2006 Dec]Cow Picnic</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1648&jresult=4'>114</a></td><td align='center'><a href='status.php?problem_id=1648'>162</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1649</td><td align='left'><a href='problem-1649.html'>[Usaco2006 Dec]Cow Roller Coaster</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1649&jresult=4'>87</a></td><td align='center'><a href='status.php?problem_id=1649'>152</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1650</td><td align='left'><a href='problem-1650.html'>[Usaco2006 Dec]River Hopscotch</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1650&jresult=4'>74</a></td><td align='center'><a href='status.php?problem_id=1650'>120</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1651</td><td align='left'><a href='problem-1651.html'>[Usaco2006 Feb]Stall Reservations</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1651&jresult=4'>147</a></td><td align='center'><a href='status.php?problem_id=1651'>279</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1652</td><td align='left'><a href='problem-1652.html'>[Usaco2006 Feb]Treats for the Cows</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1652&jresult=4'>77</a></td><td align='center'><a href='status.php?problem_id=1652'>96</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1653</td><td align='left'><a href='problem-1653.html'>[Usaco2006 Feb]Backward Digit Sums</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1653&jresult=4'>106</a></td><td align='center'><a href='status.php?problem_id=1653'>132</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1654</td><td align='left'><a href='problem-1654.html'>[Usaco2006 Jan]The Cow Prom</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1654&jresult=4'>24</a></td><td align='center'><a href='status.php?problem_id=1654'>29</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1655</td><td align='left'><a href='problem-1655.html'>[Usaco2006 Jan] Dollar Dayz</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1655&jresult=4'>37</a></td><td align='center'><a href='status.php?problem_id=1655'>62</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1656</td><td align='left'><a href='problem-1656.html'>[Usaco2006 Jan] The Grove</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1656&jresult=4'>17</a></td><td align='center'><a href='status.php?problem_id=1656'>22</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1657</td><td align='left'><a href='problem-1657.html'>[Usaco2006 Mar]Mooo</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1657&jresult=4'>162</a></td><td align='center'><a href='status.php?problem_id=1657'>239</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1658</td><td align='left'><a href='problem-1658.html'>[Usaco2006 Mar]Water Slides</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1658&jresult=4'>27</a></td><td align='center'><a href='status.php?problem_id=1658'>52</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1659</td><td align='left'><a href='problem-1659.html'>[Usaco2006 Mar]Lights Out</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1659&jresult=4'>27</a></td><td align='center'><a href='status.php?problem_id=1659'>31</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1660</td><td align='left'><a href='problem-1660.html'>[Usaco2006 Nov]Bad Hair Day</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1660&jresult=4'>143</a></td><td align='center'><a href='status.php?problem_id=1660'>298</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1661</td><td align='left'><a href='problem-1661.html'>[Usaco2006 Nov]Big Square</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1661&jresult=4'>41</a></td><td align='center'><a href='status.php?problem_id=1661'>80</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1662</td><td align='left'><a href='problem-1662.html'>[Usaco2006 Nov]Round Numbers</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1662&jresult=4'>40</a></td><td align='center'><a href='status.php?problem_id=1662'>63</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1663</td><td align='left'><a href='problem-1663.html'>[Usaco2006 Open]</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1663&jresult=4'>46</a></td><td align='center'><a href='status.php?problem_id=1663'>93</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1664</td><td align='left'><a href='problem-1664.html'>[Usaco2006 Open]County Fair Events</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1664&jresult=4'>68</a></td><td align='center'><a href='status.php?problem_id=1664'>104</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1665</td><td align='left'><a href='problem-1665.html'>[Usaco2006 Open]The Climbing Wall</a></td><td align='center'>Silver
</td><td align='center'><a href='status.php?problem_id=1665&jresult=4'>39</a></td><td align='center'><a href='status.php?problem_id=1665'>108</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1666</td><td align='left'><a href='problem-1666.html'>[Usaco2006 Oct]Another Cow Number Game 奶牛的数字游戏
</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1666&jresult=4'>229</a></td><td align='center'><a href='status.php?problem_id=1666'>271</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1667</td><td align='left'><a href='problem-1667.html'>[Usaco2006 Oct]Cows on Skates滑旱冰的奶牛
</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1667&jresult=4'>54</a></td><td align='center'><a href='status.php?problem_id=1667'>149</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1668</td><td align='left'><a href='problem-1668.html'>[Usaco2006 Oct]Cow Pie Treasures 馅饼里的财富
</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1668&jresult=4'>126</a></td><td align='center'><a href='status.php?problem_id=1668'>217</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1669</td><td align='left'><a href='problem-1669.html'>[Usaco2006 Oct]Hungry Cows饥饿的奶牛
</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1669&jresult=4'>212</a></td><td align='center'><a href='status.php?problem_id=1669'>327</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1670</td><td align='left'><a href='problem-1670.html'>[Usaco2006 Oct]Building the Moat护城河的挖掘
</a></td><td align='center'></td><td align='center'><a href='status.php?problem_id=1670&jresult=4'>52</a></td><td align='center'><a href='status.php?problem_id=1670'>92</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1671</td><td align='left'><a href='problem-1671.html'>[Usaco2005 Dec]Knights of Ni</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1671&jresult=4'>60</a></td><td align='center'><a href='status.php?problem_id=1671'>103</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1672</td><td align='left'><a href='problem-1672.html'>[Usaco2005 Dec]Cleaning Shifts</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1672&jresult=4'>58</a></td><td align='center'><a href='status.php?problem_id=1672'>126</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1673</td><td align='left'><a href='problem-1673.html'>[Usaco2005 Dec]Scales</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1673&jresult=4'>54</a></td><td align='center'><a href='status.php?problem_id=1673'>139</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1674</td><td align='left'><a href='problem-1674.html'>[Usaco2005]Part Acquisition</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1674&jresult=4'>43</a></td><td align='center'><a href='status.php?problem_id=1674'>120</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1675</td><td align='left'><a href='problem-1675.html'>[Usaco2005 Feb]Rigging the Bovine Election</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1675&jresult=4'>31</a></td><td align='center'><a href='status.php?problem_id=1675'>39</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1676</td><td align='left'><a href='problem-1676.html'>[Usaco2005 Feb]Feed Accounting</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1676&jresult=4'>24</a></td><td align='center'><a href='status.php?problem_id=1676'>41</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1677</td><td align='left'><a href='problem-1677.html'>[Usaco2005 Jan]Sumsets</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1677&jresult=4'>140</a></td><td align='center'><a href='status.php?problem_id=1677'>278</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1678</td><td align='left'><a href='problem-1678.html'>[Usaco2005 Jan] Watchcow</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1678&jresult=4'>0</a></td><td align='center'><a href='status.php?problem_id=1678'>16</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1679</td><td align='left'><a href='problem-1679.html'>[Usaco2005 Jan]Moo Volume</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1679&jresult=4'>172</a></td><td align='center'><a href='status.php?problem_id=1679'>342</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1680</td><td align='left'><a href='problem-1680.html'>[Usaco2005 Mar]Yogurt factory</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1680&jresult=4'>40</a></td><td align='center'><a href='status.php?problem_id=1680'>55</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1681</td><td align='left'><a href='problem-1681.html'>[Usaco2005 Mar]Checking an Alibi</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1681&jresult=4'>24</a></td><td align='center'><a href='status.php?problem_id=1681'>29</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1682</td><td align='left'><a href='problem-1682.html'>[Usaco2005 Mar]Out of Hay</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1682&jresult=4'>108</a></td><td align='center'><a href='status.php?problem_id=1682'>155</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1683</td><td align='left'><a href='problem-1683.html'>[Usaco2005 Nov]City skyline</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1683&jresult=4'>67</a></td><td align='center'><a href='status.php?problem_id=1683'>78</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1684</td><td align='left'><a href='problem-1684.html'>[Usaco2005 Oct]Close Encounter</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1684&jresult=4'>51</a></td><td align='center'><a href='status.php?problem_id=1684'>112</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1685</td><td align='left'><a href='problem-1685.html'>[Usaco2005 Oct]Allowance</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1685&jresult=4'>44</a></td><td align='center'><a href='status.php?problem_id=1685'>55</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1686</td><td align='left'><a href='problem-1686.html'>[Usaco2005 Open]Waves</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1686&jresult=4'>7</a></td><td align='center'><a href='status.php?problem_id=1686'>8</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1687</td><td align='left'><a href='problem-1687.html'>[Usaco2005 Open]Navigating the City</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1687&jresult=4'>20</a></td><td align='center'><a href='status.php?problem_id=1687'>29</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1688</td><td align='left'><a href='problem-1688.html'>[Usaco2005 Open]Disease Manangement</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1688&jresult=4'>113</a></td><td align='center'><a href='status.php?problem_id=1688'>175</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1689</td><td align='left'><a href='problem-1689.html'>[Usaco2005 Open] Muddy roads</a></td><td align='center'>Silver</td><td align='center'><a href='status.php?problem_id=1689&jresult=4'>64</a></td><td align='center'><a href='status.php?problem_id=1689'>86</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1690</td><td align='left'><a href='problem-1690.html'>[Usaco2007 Dec]奶牛的旅行</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1690&jresult=4'>98</a></td><td align='center'><a href='status.php?problem_id=1690'>182</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1691</td><td align='left'><a href='problem-1691.html'>[Usaco2007 Dec]挑剔的美食家</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1691&jresult=4'>80</a></td><td align='center'><a href='status.php?problem_id=1691'>189</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1692</td><td align='left'><a href='problem-1692.html'>[Usaco2007 Dec]队列变换</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1692&jresult=4'>82</a></td><td align='center'><a href='status.php?problem_id=1692'>222</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1693</td><td align='left'><a href='problem-1693.html'>[Usaco2007 Demo]Asteroids</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1693&jresult=4'>39</a></td><td align='center'><a href='status.php?problem_id=1693'>44</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1694</td><td align='left'><a href='problem-1694.html'>[Usaco2007 Demo]Grazing on the Run</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1694&jresult=4'>15</a></td><td align='center'><a href='status.php?problem_id=1694'>23</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1695</td><td align='left'><a href='problem-1695.html'>[Usaco2007 Demo]Walk the Talk</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1695&jresult=4'>0</a></td><td align='center'><a href='status.php?problem_id=1695'>3</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1696</td><td align='left'><a href='problem-1696.html'>[Usaco2007 Feb]Building A New Barn新牛舍</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1696&jresult=4'>53</a></td><td align='center'><a href='status.php?problem_id=1696'>118</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1697</td><td align='left'><a href='problem-1697.html'>[Usaco2007 Feb]Cow Sorting牛排序</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1697&jresult=4'>82</a></td><td align='center'><a href='status.php?problem_id=1697'>143</a></td></tr>

<tr class='evenrow'><td></td><td align='center'>1698</td><td align='left'><a href='problem-1698.html'>[Usaco2007 Feb]Lilypad Pond 荷叶池塘</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1698&jresult=4'>29</a></td><td align='center'><a href='status.php?problem_id=1698'>101</a></td></tr>

<tr class='oddrow'><td></td><td align='center'>1699</td><td align='left'><a href='problem-1699.html'>[Usaco2007 Jan]Balanced Lineup排队</a></td><td align='center'>Gold</td><td align='center'><a href='status.php?problem_id=1699&jresult=4'>243</a></td><td align='center'><a href='status.php?problem_id=1699'>355</a></td></tr>
</tbody>
</table></center>
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